John Gunn

John Gunn

Canada Research Chair Tier 1 for Stressed Aquatic Systems

Director, Living with Lakes Centre, Laurentian University

935 Ramsey Lake Road

Sudbury, ON

P3E 2C6

t. 705-675-4831

f. 705-671-3857

Research Interests

My research focuses on the effects of multiple stressors on aquatic ecosystems with a particular interest in the factors that affect recovery from disturbance.  Initially my research was concentrated on lake trout and other boreal fish species.  In recent years more and more of the work has been directed at understanding the ecology of benthic invertebrates key biogeochemical processes such as DOM production and release of contaminants such as Hg, processes that are primarily microbial in origins.


Publications (last 6 years)

Babin-Fenske, JJ. T.J.S. Merritt, J.M. Gunn, T. Walsh and D. Lesbarreres. 2012. Phylogenetic analysis of Hyalella colonization in lakes recovering from acidification and metal contamination. Can. J. Zool. In press.

Davidson, J. And J.M.Gunn. 2012.  Effects of Land Cover Disturbance on Stream Invertebrate Diversity and Metal Concentrations in a Small Urban Industrial Watershed. Journal of Human and EcologicalRisk Assessment. In press.

Cantin, A. B.E.Beisner, J. M. Gunn, Y.T. Prairie, and J. G. Winter. 2011. Effects of thermocline deepening on lake plankton communities.  Can. J. Fish. Aquat. Sci. 68(2):260-276.

Cott, P.A., T.A. Johnston, and J.M. Gunn.  2011.  Food web position of burbot relative to lake trout, northern pike, and lake whitefish in four sub-arctic boreal lakes.  Journal of Applied Ichthyology. 27(s1):49-56

Szkokan-Emilson, E., Wesolek, B., and Gunn, J. 2011. Terrestrial organic matter as trophic subsidies that aid in the recovery of macroinvertebrates in industrially-damaged lakes. Ecological Applications. 21(6):2082-2093

Gunn, J.M and E. Snucins. 2010.  Brook charr mortalities during extreme temperature events in Sutton River, Hudson Bay Lowlands, Canada.  Hydrobiologia. 650:79-84.

Gunn, J.M., C. Sarrazin-Delay, B. Wesolek, A. Stasko, and E. Szkokan-Emilson. 2010.  Delayed recovery of benthic macroinvertebrate communities in Junction Creek, Sudbury, Ontario after the diversion of acid mine drainage.  J. Hum. Ecol. Risk. Assess. 16:901-912.

Kreutzweiser, D.P., E.A. Muto, S.B. Holmes and J.M. Gunn. 2010. Effects of upland clearcutting and riparian partial-harvesting on leaf pack breakdown and aquatic invertebrates in boreal forest streams. Freshwater Biology. doi:10.1111/j.1365-2427.2010.02410.x

Luek, A., G.E. Morgan, B. Wissel, J.M. Gunn, and C.W. Ramcharan.  2010. Rapid and unexpected effects of piscivore introduction on trophic position and diet of perch (Perca flavescens) in recovery lakes. Freshwater Biology. 55:1616-1627.

Wesolek, B.E., E.K. Genrich, J.M. Gunn and K.M. Somers. 2010. Use of littoral benthic invertebrates to assess factors affecting biological recovery of acid and metal damaged lakes. Journal of the North American Benthological Society. 29(2):572-585. doi: 10.1899/09-123.1

Wesolek, B. E., E. Szkokan-Emilson, and J.M. Gunn. 2010. Assessment of Littoral Benthic Invertebrate Communities at the Land–water Interface in Systems Recovering from Severe Acid and Metal Damage.  J. Hum. Ecol. Risk. Assess. 16:536-559

Kaufman, S.D., Snucins, E., Gunn, J.M. and Selinger, W. 2009.  Impacts of road access on lake trout (Salvelinus namaycush) populations: Regional scale effects of overexploitation and the introduction of smallmouth bass (Micropterus dolomieu). Can. J. Fish. Aquat. Sci. 66(2): 1-12.

Kaufman, S.D., Morgan, G.E., and Gunn, J.M. 2009. The Role of Ciscoes as Prey in the Trophy Growth Potential of Walleyes. N. Amer. J. Fish. Man. 29(2):468-477.

Szkokan-Emilson, E., B. Wesolek, J.M. Gunn, C. Sarrazin-Delay, J. Bedore, F. Chan, D. Garreau, A. O’Grady, and C. Robinson.  2010. Recovery from acidification of benthic invertebrate communities in Killarney Park lakes. Environmental Monitoring and Assessment. 166:293–302 DOI10.1007/s10661-009-1002-x

Kreutzweiser, D.P., Hazlett, P.W. and Gunn, J.M. 2008.  Logging impacts on the biogeochemistry of boreal forest soils and nutrient export to aquatic systems. Environ. Review 16: 157-179

Rasmussen, J.B., J.M. Gunn, G. Sherwood, A. Iles, A. Gagnon, A. Lacroix, P.G.C. Campbell, and A. Hontela. 2008.  Direct and Indirect effects of metal exposure on the growth of yellow perch (Perca flavescens): Implications for Ecological Risk Assessment.  J. Hum. Ecol. Risk. Assess. 14(2):317-350

Bowman, M.F., R. Ingram, R.A. Reid, K.M. Somers, N.D. Yan, A.M. Paterson, G.E. Morgan, and J.M. Gunn. 2008.  Temporal and spatial concordance in community structure of lake- phytoplankton, zooplankton, macroinvertebrate, crayfish, and fish on the Precambrian Shield.  Can. J. Fish. Aquat. Sci. 65(5):919-932.

Tanentzap, A.J., Yan, N.D., Keller, B., Girard, R., Heneberry, J., Gunn, J.M., Hamilton, D.P., and Taylor, P.A.  2008.  Cooling lakes while the world warms: Effects of forest re-growth and increased dissolved organic matter on the thermal regime of a temperate, urban lake.  Limnology and Oceanography 53(1):400-404.

Tremblay, A., Lesbarrerres, D., Merritt, T., Wilson, C., and Gunn, J.M. 2008. Genetic structure and  phenotypic plasticity of yellow perch (Perca flavescens) populations influenced by habitat, predation, and contamination gradients. Learned Discourses, Integrated Environmental Assessment and Management. 4(2):264-266.

Yan, N. D., Somers, K. M., Girard, R.E., Paterson, A.M., Ramcharan, C.W., Rusak, J.A., Ingram, R., Morgan, G.E., and Gunn, J.M.  2008.  Long-term changes in crustacean zooplankton communities of Dorset, Ontario lakes: the probable interactive effects of changes in pH, TP, Dissolved Organic Carbon, and predators.  Can. J. Fish. Aquat. Sci. 65(5): 862-877.

Yang, D.Y. Chen, Y-.W., Gunn, J.M. and Belzile, N.  2008.  Selenium and mercury in organisms: Interactions and mechanisms.  Environ. Rev. 16:1-22.

Esteve, M., McLennan, D.A. and Gunn, J.M.  2007. Lake Trout (Salvelinus namaycush) spawning behaviour: the evolution of a new female strategy.  Environ. Biol. Fish. ISSN: 0378-1909 (Print) 1573-5133 (Online)

Keller, W., N.D. Yan, J.M. Gunn, and J. Heneberry. 2007. Recovery of acidified lakes: lessons from Sudbury, Ontario, Canada. Water Air Soil Pollut. Focus 7: 317-322. DOI 10.1007/s11267-006-9061-2.

Lippert, K.A., Gunn, J.M., and Morgan, G.E.  2007.  Effects of colonizing predators on yellow perch (Perca flavescens) populations in lakes recovering from acidification and metal stress.  Can. J. Fish. Aquat. Sci. 64(10):1413-1428.

Belzile, N., Y.-W. Chen, J. Tong, J. Gunn, Y. Alarie, T. Delongchamp, and C.Y. Lang. 2006. The effects of selenium on mercury assimilation by freshwater organisms. Can. J. Fish. Aquat. Sci. 63:1-10.

Kaufman, S., J.M. Gunn, and G.E. Morgan. 2006. Muscle enzymes reveal that both walleye (Sander vitreus) and its prey yellow perch (Perca flavescens) are less active when larger alternate prey  species (lake herring) are present. Can. J. Fish. Aquat. Sci. 63:970-979.

Keller, W., Yan, N.D., Gunn, J.M. and Heneberry, J.  2006.  Recovery of acidified lakes: lessons from Sudbury, Ontario, Canada. Water Air Soil Pollut. Focus. 10.1007/s11267-006-9061-2.

Keller, W., Heneberry, J., Leduc, J., Gunn, J. and Yan, N. 2006. Variations in epilimnion thickness in small Boreal Shield lakes: relationships with transparency, weather and acidification. Env. Mon. Assess. 115: 419-431.



Gunn, J.M., R.J. Steedman and R.A. Ryder. 2004. Boreal Shield Watersheds: Lake trout ecosystems in a changing environment. Lewis Publishers. 501 p.

Gunn, John M. (ed.) 1995. Restoration and Recovery of an Industrial Region. Springer-Verlag, New York, 358 p.